Upgrading old User Reg system to WA version

Upgrading old User Reg system to WA version

I managed to get the data from a .asp MS Access driven user registration system ported over to the WA User Reg pack. At first I thought I had it nailed, until one user tried to login and he had used a password that did not fit the Spry requirements. So, I'm not sure what options I have at this point - reset all users passwords to a compliant one and inform them of the change? Or is there a better way?